# tell 获取光标的位置 单位字节。
# f = open('文件的读写', encoding='utf-8')
# print(f.tell())
# content = f.read()
# # print(content)
# print(f.tell())
# f.close()

# seek 调整光标的位置
# f = open('文件的读写', encoding='utf-8')
# f.seek(7)
# content = f.read()
# print(content)
# f.close()

# flush 强制刷新
# f = open('文件的其他功能', encoding='utf-8',mode='w')
# f.write('fdshdsjgsdlkjfdf')
# f.flush()
# f.close()